In 2014, he was honored to command for 2 years the 596 Airmobile Battalion, one of the best units in the Hellenic Armed Forces, which concurrently with its national mission participates in the HELBROC Battle Group, as Core Battalion. During his command, the aforementioned Battalion was evaluated by national and international authorities for the stand-by period of HELBROC-BG, by preparing and executing the “TALOS” exercise, with excellent results.

On 7th June 2018, he assumed command of the MPSOTC.

Moreover, Col Eleftherios KALLES is experienced in staff positions of Major formations as follows:

International Affairs Division Staff Officer in the Hellenic 1st ARMY (2013),

Media Chief PIO in the EL EU Operational Headquarters (OHQ) - (2014) for the EUFOR Military Mission to the Central African Republic, an almost 6 months period profoundly productive for his personal as well as professional development, since this was the 1st EU led Military Mission assigned to an Operational HQ.